Earlier this year, the Jersey Shore reality star surprised fans when he entered rehab for a prescription drug problem, but luckily, the abtastic Jersey boy is now doing better than ever.

He is back with the Shore crew, filming the sixth season in Seaside Heights, alongside Snooki, Deena, JWoww, Ronnie, Pauly D and Sammi Sweetheart.

Wish The Sitch a very happy birthday in the comments below and click through the gallery to see his infamous six-pack abs.

The festivities are sure to be a blow out bash today.

As Celebuzz previously reported, his pregnant co-star Snooki was spotted on her way back to the Jersey Shore house in Seaside Heights, N.J. on Tuesday, pushing around a baby stroller filled with booze.